ipfilter(1) freebsd man page | unix.com

IPFILTER(1)						      General Commands Manual						       IPFILTER(1)

NAME
       IP Filter

DESCRIPTION
       IP  Filter  is a package providing packet filtering capabilities for a variety of operating systems.  On a properly setup system, it can be
       used to build a firewall.

SEE ALSO
       ipf(8), ipf(1), ipf(5), ipnat(8), ipnat(5), mkfilters(1)

																       IPFILTER(1)